Abstract
Nyctinasty, a circadian-regulated leaf movement observed in legumes, has long intrigued scientists. This study identified genus-specific endogenous chemical factors, leaf-closing factors (LCFs) and leaf-opening factors (LOFs), that control this rhythmic behavior. In Samanea saman, a model for nyctinasty, the LCF 12-hydroxyjasmonic acid glucoside induces leaf-folding by selectively targeting extensor motor cells and activating reactive oxygen species (ROS)-dependent K+ efflux via the SPORK2 channel. Functional analyses revealed that SPORK2 and the SsSLAH1/SsSLAH3 anion channel complex are key effectors in the regulation of leaf movement. Remarkably, SPORK2 also functions as a temperature-sensitive K+ channel, inactivating at low temperatures to mediate rain-induced leaf folding, a phenomenon underlying the nickname “rain tree”. These findings provide a chemical entry point to dissect the molecular machinery of nyctinasty and reveal a previously unrecognized role for plant K+ channels in temperature sensing.
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Claims 8
Claim · model-written summary
Genus-specific leaf-closing and leaf-opening factors were identified as controlling the rhythmic leaf movement of legumes.
Verbatim
e0“Nyctinasty, a circadian-regulated leaf movement observed in legumes, has long intrigued scientists”
e1“This study identified genus-specific endogenous chemical factors, leaf-closing factors (LCFs) and leaf-opening factors (LOFs), that control this rhythmic behavior”
Claim · model-written summary
The LCF 12-hydroxyjasmonic acid glucoside induced leaf-folding in Samanea saman.
- Taxon
- Samanea saman
Samanea samane2 - Treatment
- LCF 12-hydroxyjasmonic acid glucosidee2
- Outcome
- leaf-foldinge2
- Direction
- inducese2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e2“In Samanea saman, a model for nyctinasty, the LCF 12-hydroxyjasmonic acid glucoside induces leaf-folding by selectively targeting extensor motor cells and activating reactive oxygen species (ROS)-dependent K+ efflux via the SPORK2 channel”
Claim · model-written summary
The LCF 12-hydroxyjasmonic acid glucoside selectively targets extensor motor cells in Samanea saman.
- Taxon
- Samanea samanSamanea samane2
- Organ / stage
- extensor motor cellse2
- Compound
- LCF 12-hydroxyjasmonic acid glucosidee2
- Outcome
- selectively targeting extensor motor cellse2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e2“In Samanea saman, a model for nyctinasty, the LCF 12-hydroxyjasmonic acid glucoside induces leaf-folding by selectively targeting extensor motor cells and activating reactive oxygen species (ROS)-dependent K+ efflux via the SPORK2 channel”
Claim · model-written summary
The LCF 12-hydroxyjasmonic acid glucoside activates reactive oxygen species (ROS)-dependent K+ efflux via the SPORK2 channel in Samanea saman.
- Taxon
- Samanea samanSamanea samane2
- Gene
- SPORK2e2
- Compound
- LCF 12-hydroxyjasmonic acid glucosidee2
- Outcome
- reactive oxygen species (ROS)-dependent K+ effluxe2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e2“In Samanea saman, a model for nyctinasty, the LCF 12-hydroxyjasmonic acid glucoside induces leaf-folding by selectively targeting extensor motor cells and activating reactive oxygen species (ROS)-dependent K+ efflux via the SPORK2 channel”
Claim · model-written summary
SPORK2 and the SsSLAH1/SsSLAH3 anion channel complex are key effectors in regulating leaf movement in Samanea saman.
- Taxon
- Samanea samanSamanea samane2
- Gene
- SPORK2 and the SsSLAH1/SsSLAH3 anion channel complexe3
- Outcome
- regulation of leaf movemente3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e2“In Samanea saman, a model for nyctinasty, the LCF 12-hydroxyjasmonic acid glucoside induces leaf-folding by selectively targeting extensor motor cells and activating reactive oxygen species (ROS)-dependent K+ efflux via the SPORK2 channel”
e3“Functional analyses revealed that SPORK2 and the SsSLAH1/SsSLAH3 anion channel complex are key effectors in the regulation of leaf movement”
Claim · model-written summary
Low temperatures inactivate SPORK2, which functions as a temperature-sensitive K+ channel in Samanea saman.
- Taxon
- Samanea samanSamanea samane2
- Treatment
- low temperaturese4
- Gene
- SPORK2e4
- Outcome
- temperature-sensitive K+ channele4
- Direction
- inactivatinge4
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e2“In Samanea saman, a model for nyctinasty, the LCF 12-hydroxyjasmonic acid glucoside induces leaf-folding by selectively targeting extensor motor cells and activating reactive oxygen species (ROS)-dependent K+ efflux via the SPORK2 channel”
e4“SPORK2 also functions as a temperature-sensitive K+ channel, inactivating at low temperatures to mediate rain-induced leaf folding”
Claim · model-written summary
SPORK2 mediates rain-induced leaf folding in Samanea saman.
- Taxon
- Samanea samanSamanea samane2
- Gene
- SPORK2e4
- Outcome
- rain-induced leaf foldinge4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e2“In Samanea saman, a model for nyctinasty, the LCF 12-hydroxyjasmonic acid glucoside induces leaf-folding by selectively targeting extensor motor cells and activating reactive oxygen species (ROS)-dependent K+ efflux via the SPORK2 channel”
e4“SPORK2 also functions as a temperature-sensitive K+ channel, inactivating at low temperatures to mediate rain-induced leaf folding”
Claim · model-written summary
Plant K+ channels have a previously unrecognized role in temperature sensing.
Verbatim
e5“reveal a previously unrecognized role for plant K+ channels in temperature sensing”